Keep your sensitive data private, prevent unauthorized viewing and protect the surface of your 20"" LCD monitor with this multipurpose privacy filter. Microlouver technology creates a restricted viewing angle to keep your display visible to only those directly in front of the screen. Side view is black. Higher light transmission offers better visual clarity and increases contrast while eliminating glare to help prevent eyestrain. Aspect ratio is 16:9. Included microfiber cleaning cloth lets you safely wipe down its surface to prevent dust buildup.